Hidden extra
Supplement and hidden extra are semantically related. In some cases you can use "Supplement" instead a noun phrase "Hidden extra".
Supplement
Supplement noun - Something added (as by growth).
Hidden extra and supplement are semantically related. Sometimes you can use "Hidden extra" instead a noun "Supplement".
Cite this Source
Supplement and Hidden extra. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/hidden_extra/supplement
Hidden extra & Supplement. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/hidden_extra/supplement>.
Supplement or Hidden extra. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/hidden_extra/supplement.
Google Ngram Viewer shows how "hidden extra" and "supplement" have occurred on timeline